# How to choose only certain values my matrix answer

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Krishma Gold on 12 Sep 2019
Commented: Krishma Gold on 14 Sep 2019
Hi. Grateful for any help please.
My output is in matrix, say 400 563 674 904 789
Now i want to use 563 to 904, as a matrix in another algorithm without me redefining it.
Many thanks

David Hill on 12 Sep 2019
A=[400,563,674,904,789];
B=A(A>=563&A<=904);

Krishma Gold on 14 Sep 2019
hi. Sorry may be i have not explained myself well.
Say my output is
400
563
674
904
789
i want to use this output in another algorithm but only these figures
400
563
674
904
should i use a loop?
Any help will be grateful. Many thanks
David Hill on 14 Sep 2019
My B above gives you that output. If you want a column vector just add an apostrophe.
A=[400,563,674,904,789];
B=A(A>=563&A<=904)';
Krishma Gold on 14 Sep 2019
thank you

Walter Roberson on 14 Sep 2019
A=[400,563,674,904,789];
idx1 = find(A>=563, 1, 'first');
idx2 = find(A>=904, 1, 'first');
A(idx1:idx2)
but I suspect what you might be looking for is:
A(2:end-1)

#### 1 Comment

Krishma Gold on 14 Sep 2019
Thank you
you are right ....A(2:end-1).... works perfectly